I am working on an animation where one large plane is flying through the
air.

I would like to add some realistic clouds and ... thunder. Any ideas how
this can be done? The thunder does not have te be visible directly. Just the
illumination on the clouds. (I saw this in the movie 7 days, 7 nights).

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"jansb000" <jan### [at] wxsnl> wrote in message
news:3b1b5d2d$1@news.povray.org...
>
> I would like to add some realistic clouds and ... thunder. Any ideas how
> this can be done? The thunder does not have te be visible directly. Just
the
> illumination on the clouds. (I saw this in the movie 7 days, 7 nights).

Easy enough.  Well, easy if you know media.
Place several light sources in and around the media clouds and set them to
flash randomly.

// WhereCloudsAre would be the confines of media container or therein.

#declare LightningPlace=rand(seed(123*clock))*WhereCloudsAre;
#declare Flash=rand(seed(321*clock));

#if (Flash<.5) #declare Flash=0; #end // limiter

light_source {LightningPlace,Flash}

There are some fine examples of media clouds in the newsgroups here,
povray.binaries.scene-files or the p.t.s-f.

You did ask for realism so media is about it for that.  Then again you might
be able to use the textured layered plane or sphere method.

Bob H.

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In article <3b1b5d2d$1@news.povray.org>, "jansb000" <jan### [at] wxsnl> 
wrote:

> I would like to add some realistic clouds and ... thunder. Any ideas how
> this can be done? The thunder does not have te be visible directly. Just the
> illumination on the clouds.

I assume you mean lightning...just put a bright light source in the 
clouds when you want a flash of lightning (assuming you are using media 
clouds). A one-frame flash might be enough, or you may want groups of 
flashes over a period of time, which would be a bit more involved but 
not difficult.

-- 
Christopher James Huff - chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><

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If  I was you, I would work on a good bozo map with turbulence for the
clouds, then make one of the value change from whatever to bluewish / white
randomly, for wuick period of time.

"Chris Huff" <chr### [at] maccom> wrote in message
news:chr### [at] povrayorg...
> In article <3b1b5d2d$1@news.povray.org>, "jansb000" <jan### [at] wxsnl>
> wrote:
>
> > I would like to add some realistic clouds and ... thunder. Any ideas how
> > this can be done? The thunder does not have te be visible directly. Just
the
> > illumination on the clouds.
>
> I assume you mean lightning...just put a bright light source in the
> clouds when you want a flash of lightning (assuming you are using media
> clouds). A one-frame flash might be enough, or you may want groups of
> flashes over a period of time, which would be a bit more involved but
> not difficult.
>
> --
> Christopher James Huff - chr### [at] maccom,
http://homepage.mac.com/chrishuff/
> TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
>
> <><

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